1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Arizona-i2c.c  --  Arizona I2C bus interface
  4 *
  5 * Copyright 2012 Wolfson Microelectronics plc
  6 *
  7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
  8 */
  9
 10#include <linux/err.h>
 11#include <linux/i2c.h>
 12#include <linux/module.h>
 13#include <linux/pm_runtime.h>
 14#include <linux/regmap.h>
 15#include <linux/regulator/consumer.h>
 16#include <linux/slab.h>
 17#include <linux/of.h>
 18
 19#include <linux/mfd/arizona/core.h>
 20
 21#include "arizona.h"
 22
 23static int arizona_i2c_probe(struct i2c_client *i2c,
 24			     const struct i2c_device_id *id)
 25{
 26	const void *match_data;
 27	struct arizona *arizona;
 28	const struct regmap_config *regmap_config = NULL;
 29	unsigned long type = 0;
 30	int ret;
 31
 32	match_data = device_get_match_data(&i2c->dev);
 33	if (match_data)
 34		type = (unsigned long)match_data;
 35	else if (id)
 36		type = id->driver_data;
 37
 38	switch (type) {
 39	case WM5102:
 40		if (IS_ENABLED(CONFIG_MFD_WM5102))
 41			regmap_config = &wm5102_i2c_regmap;
 42		break;
 43	case WM5110:
 44	case WM8280:
 45		if (IS_ENABLED(CONFIG_MFD_WM5110))
 46			regmap_config = &wm5110_i2c_regmap;
 47		break;
 48	case WM8997:
 49		if (IS_ENABLED(CONFIG_MFD_WM8997))
 50			regmap_config = &wm8997_i2c_regmap;
 51		break;
 52	case WM8998:
 53	case WM1814:
 54		if (IS_ENABLED(CONFIG_MFD_WM8998))
 55			regmap_config = &wm8998_i2c_regmap;
 56		break;
 57	default:
 58		dev_err(&i2c->dev, "Unknown device type %ld\n", type);
 59		return -EINVAL;
 60	}
 61
 62	if (!regmap_config) {
 63		dev_err(&i2c->dev,
 64			"No kernel support for device type %ld\n", type);
 65		return -EINVAL;
 66	}
 67
 68	arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
 69	if (arizona == NULL)
 70		return -ENOMEM;
 71
 72	arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
 73	if (IS_ERR(arizona->regmap)) {
 74		ret = PTR_ERR(arizona->regmap);
 75		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 76			ret);
 77		return ret;
 78	}
 79
 80	arizona->type = type;
 81	arizona->dev = &i2c->dev;
 82	arizona->irq = i2c->irq;
 83
 84	return arizona_dev_init(arizona);
 85}
 86
 87static int arizona_i2c_remove(struct i2c_client *i2c)
 88{
 89	struct arizona *arizona = dev_get_drvdata(&i2c->dev);
 90
 91	arizona_dev_exit(arizona);
 92
 93	return 0;
 94}
 95
 96static const struct i2c_device_id arizona_i2c_id[] = {
 97	{ "wm5102", WM5102 },
 98	{ "wm5110", WM5110 },
 99	{ "wm8280", WM8280 },
100	{ "wm8997", WM8997 },
101	{ "wm8998", WM8998 },
102	{ "wm1814", WM1814 },
103	{ }
104};
105MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
106
107static struct i2c_driver arizona_i2c_driver = {
108	.driver = {
109		.name	= "arizona",
110		.pm	= &arizona_pm_ops,
111		.of_match_table	= of_match_ptr(arizona_of_match),
112	},
113	.probe		= arizona_i2c_probe,
114	.remove		= arizona_i2c_remove,
115	.id_table	= arizona_i2c_id,
116};
117
118module_i2c_driver(arizona_i2c_driver);
119
120MODULE_SOFTDEP("pre: arizona_ldo1");
121MODULE_DESCRIPTION("Arizona I2C bus interface");
122MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
123MODULE_LICENSE("GPL");